US6772506B2 - Method for detaching swaged components of a disc drive - Google Patents
Method for detaching swaged components of a disc drive Download PDFInfo
- Publication number
- US6772506B2 US6772506B2 US09/867,171 US86717101A US6772506B2 US 6772506 B2 US6772506 B2 US 6772506B2 US 86717101 A US86717101 A US 86717101A US 6772506 B2 US6772506 B2 US 6772506B2
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- United States
- Prior art keywords
- actuator
- rod
- flanged end
- block
- relative
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
- B23D31/002—Breaking machines, i.e. pre-cutting and subsequent breaking
- B23D31/003—Breaking machines, i.e. pre-cutting and subsequent breaking for rings
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/10—Structure or manufacture of housings or shields for heads
- G11B5/105—Mounting of head within housing or assembling of head and housing
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
- Y10T29/49023—Magnetic recording reproducing transducer [e.g., tape head, core, etc.] including dissassembly step
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
- Y10T29/49025—Making disc drive
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
- Y10T29/49027—Mounting preformed head/core onto other structure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49815—Disassembling
- Y10T29/49821—Disassembling by altering or destroying work part or connector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49815—Disassembling
- Y10T29/49822—Disassembling by applying force
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49815—Disassembling
- Y10T29/49822—Disassembling by applying force
- Y10T29/49824—Disassembling by applying force to elastically deform work part or connector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53274—Means to disassemble electrical device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/49—Member deformed in situ
- Y10T403/4924—Inner member is expanded by longitudinally inserted element
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/49—Member deformed in situ
- Y10T403/4966—Deformation occurs simultaneously with assembly
Definitions
- the present invention relates to a disc drive storage system.
- the present invention relates to a device for removing a suspension system supporting a head gimbal assembly from an actuator arm.
- Disc drives are well-known in the industry. Disc drives are used to store digital information on rigid discs coated with a magnetizable material and a plurality of circular, concentric data tracks. Discs are mounted on a spindle motor, which rotates the discs for operation. Information is read from or written to the disc surface via transducers carried on a slider, supported relative to the disc surface via a suspension system.
- the suspension assembly includes a load beam and a gimbal spring for supporting the slider.
- the slider is coupled to the gimbal spring at an upper surface of the slider.
- the gimbal spring is also coupled to the load beam.
- the lower surface of the slider defines an air bearing surface. Rotation of a disc via the spindle motor interacts with the air bearing surface of the slider to create a hydrodynamic lifting force to lift the slider to fly above the disc surface for reading information from and writing information to the disc surface.
- the gimbal spring supports the slider to allow the slider to pitch and roll relative to the disc surface for operation.
- the load beam supplies a preload force to counteract the hydrodynamic lifting force of the slider
- the preload force supplied by the load beam, and the hydrodynamic lifting force created by the air bearing surface and rotation of the disc, define the fly characteristics of the slider (and transducer) above the disc surface.
- the slider is positioned relative to various concentric data tracks via an actuator mechanism.
- the actuator mechanism typically includes an “E-block” assembly, which is rotationally coupled to a base of the disc drive to define a rotary-type actuator.
- the “E-block” includes a plurality of spaced actuator arms and is rotationally operated via an actuator drive under the control of electronic circuitry.
- the suspension assemblies supporting the slider are coupled to actuator arms of an “E-block” in alignment with upper and lower surfaces of discs supported by the spindle motor.
- the suspension assemblies are coupled to actuator arms via a swaging technique.
- the suspension assemblies each include a tubular-shaped stake having an open central channel extending therethrough. The outer dimension of the stake is sized for insertion into a hole extending through an actuator arm of the “E-block”. After the stake is inserted into the hole, the stake is swaged (radially deformed) to the hole of the actuator arm to secure the suspension assembly to the actuator arm.
- suspension assemblies are coupled to opposed surfaces of an actuator arm for alignment relative to upper and lower disc surfaces.
- a tubular-shaped stake of a first suspension assembly is inserted into an upper portion of the hole such that extended ends of the stake extend downwardly from the fixed end.
- the stake is coupled to the upper portion of the hole for alignment relative to an upper disc surface.
- a stake of a second suspension assembly is inserted into a lower portion of the hole such that extended ends of the stake extend upwardly from a fixed end.
- the stake is coupled to the lower portion of the hole for alignment relative to a lower disc surface.
- a swaging device is inserted through the central channel of stakes positioned in the hole to impart a swaging force to deform the stakes against the wall of the hole for permanently connecting suspension assemblies to the actuator arms.
- the present invention relates to a device for detaching a suspension assembly, adapted to support a head, staked to an actuator arm of an actuator block of a disc drive.
- the device includes an expandable device operable between an insertion dimension and a deswaging dimension and a deswaging dimension having a flanged end defining a deswaging surface for forcing the stake from a hole of the actuator arm.
- the device is sized for insertion through channels of tubular stakes for placement relative to an extended end of the stake.
- the device is expanded to the deswaging dimension, so that the deswaging surface of the flanged end aligns with an end surface of the stake for removing the stake from the actuator block.
- the expandable device is inserted through the tubular stakes deformed within a hole of the actuator arm for placement of the flanged end relative to an extended end of the stake.
- the device is expanded to the deswaging dimension so that the flanged end of the device aligns with a ring surface of the stake.
- the device is then advanced to force the stake from the hole of the actuator arm. Since the device internally forces the stakes from the holes, the device does not interfere with other components of the actuator arm during operation so that stakes can be removed without significant damage to the actuator block.
- FIG. 1 is a schematic view of a disc drive.
- FIG. 2 is a perspective view of an “E-block” for supporting data heads for reading information from and writing information to selected data tracks.
- FIG. 3 is an exploded view of a suspension assembly coupled to an actuator arm of an “E-block”.
- FIG. 4 is a plan elevational view of an embodiment of a deswaging rod of the present invention.
- FIG. 5 is an end view of the deswaging rod of FIG. 4 .
- FIG. 6 is an illustrative view showing insertion of a deswaging rod through stakes of suspension assemblies coupled to an actuator arm for deswaging operation.
- FIG. 7 is an illustrative view similar to FIG. 6, illustrating insertion of an actuator rod through a central channel of the deswaging rod for expanding the deswaging rod for operation.
- FIG. 8 is a schematic illustration of a deswaging apparatus for operating the deswaging rod and actuator rod for removing a suspension assembly staked to an actuator arm.
- FIG. 9 is a more detailed exploded view of an embodiment of a deswaging apparatus for operating the deswaging rod and actuator rod.
- FIG. 10 is a side view illustrating an actuator block support fixture for supporting an “E-block” for deswaging a suspension assembly staked to an actuator arm.
- FIG. 11 is a side elevational view of an embodiment of a deswaging apparatus incorporating drive assemblies for actuating the deswaging rod and actuator rod.
- FIG. 12 is a more detailed view of a portion of a swaging fixture block supporting opposed plates having deswaging rod and actuator rod extending therethrough for operation.
- FIG. 13 is a view taken along line 13 — 13 of FIG. 11 .
- FIG. 14 is a flow chart illustrating operation of an embodiment of a deswaging apparatus of the present invention.
- FIG. 1 is a schematic view illustrating a disc drive 50 .
- disc drive 50 includes housing 52 (shown schematically), disc stack 54 , and a plurality of head gimbal assemblies (HGAs) 56 , which are supported relative to disc stack 54 and actuated by actuator assembly 58 .
- Disc stack 54 includes a plurality of discs 60 , 62 , 64 , and 66 , supported for co-rotation about spindle axis 68 by a spindle motor 70 .
- the head gimbal assemblies 56 support a disc head slider via a gimbal spring (not shown) for reading information from and writing information to upper and lower disc surfaces in a known manner.
- the actuator assembly 58 includes actuator block 72 and actuator drive 74 .
- Actuator block 72 is rotationally coupled to housing 52 for operation about pivot axis 76 in a known manner.
- a rotary-type actuator is described, it should be understood that the invention is not limited to a rotary actuator system and that other actuators, such as a linear actuator, may be employed.
- a plurality of spaced, stacked actuator arms 78 , 80 , 82 , 84 extend from the actuator block 72 in alignment with upper and lower surfaces of discs 60 , 62 , 64 , and 66 .
- the HGAs 56 are coupled to actuator arms 78 , 80 , 82 , 84 via load beams 86 .
- a first actuator arm such as actuator arm 78
- an adjacent actuator arm such as actuator arm 80
- Actuator drive 74 which is typically a voice coil motor, pivots actuator block 72 about the pivot axis 76 for alignment with selected data tracks of discs 60 , 62 , 64 , and 66 . Operation of the spindle motor 70 and actuator drive 74 are controlled via control circuitry 88 of disc drive 50 .
- the disc stack 54 shown includes four (4) discs, it should be understood that the disc stack 54 may include any number of discs, and the disc drive is not limited to the specific embodiment described.
- FIG. 2 illustrates the actuator block 72 for supporting HGAs 56 .
- the actuator block 72 is rotationally coupled to housing 52 and includes a main portion 90 .
- the main portion 90 includes bearing 92 and shaft bore 94 for rotationally coupling the actuator block 72 to housing 52 .
- a plurality of actuator arms 78 , 80 , 82 , 84 are typically integrally formed with the main portion 90 , and extend from main portion 90 to define an “E-block” shaped structure.
- the actuator arms 78 , 80 , 82 , 84 are supported in a spaced relation to define gaps 96 , 98 , and 100 therebetween, respectively.
- the actuator arms 78 , 80 , 82 , 84 include a mounting hole 102 .
- the HGAs 56 are coupled to load beam 86 and are supported thereby.
- the load beam 86 and HGAs 56 define a suspension assembly.
- the HGAs 56 include slider 104 carrying transducers (not shown) for reading data from and writing data to discs.
- Suspension assemblies are coupled to the actuator arms 78 , 80 , 82 , 84 for flexibly supporting sliders 104 .
- FIG. 3 is an exploded view illustrating assembly of first and second suspension assemblies 106 , 108 to an actuator arm to support suspension assemblies 106 , 108 for operation.
- Sliders 104 of HGAs 56 are supported relative to the load beam via gimbal spring 110 in a known manner.
- suspension assemblies 106 , 108 include a mounting plate 112 , which is generally fixedly coupled to an elongated flexible portion defining the load beam 86 in a known manner.
- Mounting plate 112 includes a mounting opening 114 and a plurality of spaced holes 116 .
- Tubular-shaped stakes 118 having a central opened channel 120 extend from mounting plate 112 with channel 120 in alignment with mounting opening 114 .
- Stakes 118 may be separately or integrally formed with mounting plate 112 .
- a fixed end of stake 118 is coupled to mounting plate 112
- an extended end 122 of stake 118 is spaced from mounting plate 112 .
- the tubular shape of stakes 118 defines a ring-shaped face 124 at an extended end of stakes 118 .
- the diameter of the mounting opening 114 is similar to the diameter of channel 120 to define an opened single-diameter channel extending through mounting plate 112 and stake 118 .
- the outer circumference of the tubular stake 118 is sized for insertion into hole 102 of actuator arms 78 , 80 , 82 , 84 .
- the first suspension assembly 106 is aligned to position the slider 104 upwardly, and stake 118 (i.e. extended end) extends downwardly for insertion into the upper portion of hold 102 to define an upper stake 118 - 1 for supporting the head (slider 104 ) to read information from and write information to a lower disc surface.
- the second suspension assembly 108 is aligned to position slider 104 downwardly and stake 118 - 2 (i.e. extended end 122 ) upwardly for insertion into the lower portion of hole 102 to define a lower stake 118 - 2 for supporting the head relative to an upper disc surface.
- the extended length of stakes 118 - 1 , 118 - 2 is designed for partial insertion into mounting hole 102 such that there is a gap between extended ends 122 of inserted stakes 118 - 1 and 118 - 2 .
- Stakes 118 - 1 and 118 - 2 are formed of a malleable material, such as metal; and, after stakes 118 - 1 and 118 - 2 are inserted into hole 102 , stakes 118 - 1 and 118 - 2 are deformed outwardly or radially to contact hole 102 (essentially at extended ends 122 ) by a swaging technique to secure stakes 118 - 1 and 118 - 2 to actuator arms 78 , 80 , 82 , 84 .
- actuator arm 84 supports a suspension assembly for alignment with a lower surface of disc 66 via stake 118 - 1 and does not support a second suspension assembly.
- each actuator block 72 includes multiple actuator arms 78 , 80 , 82 , 84 , supporting multiple heads to read to and write from multiple discs of a disc stack 54 .
- a single head, supported relative to one of the actuator arms 78 , 80 , 82 , 84 may be defective.
- heads are typically coupled to actuator arms 78 , 80 , 82 , 84 , by swaging or radially-deforming a stake 118 relative to hole 102 .
- FIGS. 4-5 illustrate an embodiment of a deswaging rod 130 of the present invention for removing or “deswaging” the radially-deformed stakes 118 from hole 102 of actuator arms 78 , 80 , 82 , 84 to release a defective head from the actuator block 72 .
- the deswaging rod is formed of an elongated, cylindrical member 132 .
- the cylindrical member 132 includes first and second stepped-diameter portions 136 , 138 , a plurality of elongated slits 140 spaced about the circumference of the cylindrical member and an outwardly-tapered flanged end 142 forming a deswaging face 144 .
- Slits 140 open to bore 134 located at the center of first portion 136 and the center of a small part of second portion 138 near first portion 136 .
- the slits 140 extend along a portion of the first diameter portion 136 and along the second diameter portion 138 from flanged end 142 to a distance spaced from flanged end 142 .
- the deswaging face 144 provides a surface for forcing stakes 118 from holes 102 , as will be explained.
- FIGS. 6 and 7 illustrate operation of deswaging rod 130 for removing stakes 118 from an actuator arm 78 , 80 , 82 , 84 .
- the deswaging rod 130 is sized for insertion through channel 120 of stakes 118 and holes 102 of actuator arms 78 , 80 , 82 , 84 .
- the rod 130 is inserted through stake 118 - 2 , as illustrated by arrow 146 .
- the rod 130 is advanced until flanged end 142 is aligned within gap 148 between extended ends of stakes 118 - 1 , 118 - 2 at a center axis 150 of the actuator arm 78 , 80 , 82 , 84 and gap 148 .
- the flanged end 142 of the rod 130 is aligned at center axis 150 to define an operating position of the rod 130 for removing stake 118 - 1 .
- rod 130 is expanded via slits 140 from an insertion dimension to an enlarged deswaging dimension to align flanged end 142 (and swaging face 144 ) with face 124 to force stake 118 from hole 102 as will be explained.
- the rod 130 is expanded via a cylinder-shaped actuator rod 152 having a conical tip 154 .
- the diameter of rod 152 is sized for insertion into central bore 150 of rod 130 to expand deswaging rod 134 via slits 140 .
- an actuator rod 152 is shown, it should be understood that alternate devices may be used to expand rod 130 and the invention is not limited to rod 152 .
- Actuator rod 152 is inserted, as illustrated by arrow 156 , (in opposite direction to arrow 146 ) through stake 118 - 1 to align with the flanged end 142 of rod 130 .
- Opposed plates 158 , 160 having holes 162 , 164 are supported in alignment with selected actuator arms 78 , 80 , 82 , 84 . Holes 162 , 164 of opposed plates 158 , 160 are coaxially aligned with hole 102 to facilitate insertion of rod 130 and rod 152 therethrough for operation.
- Plate 160 includes prongs 166 extending therefrom to define a biasing plate. Prongs 166 are arranged for alignment and insertion into holes 116 in mounting plate 112 - 1 . Prongs 166 extend through holes 116 to provide a biasing force to actuator arms, 78 , 80 , 82 , 84 , reactive to the force supplied to face 124 , as will be explained.
- the rod 130 is then advanced along a deswaging stroke in direction of arrow 146 to push stake 118 - 1 from hole 102 .
- the rod 130 is advanced to an extended position, shown in phantom in FIG. 7 to force stake 118 - 1 from hole 102 .
- plate 160 supplies a reactive force via prongs 166 to the actuator arms 78 , 80 , 82 , 84 to limit movement of the actuator arm so that the force of the rod 130 is directed to stake 118 - 1 and moves stake 118 - 1 relative to the actuator arm and out of hole 102 .
- FIG. 8 is a diagrammatic view of one embodiment of a deswaging apparatus 170 for operating rod 130 .
- the deswaging apparatus 170 includes a base 172 , block support fixture 174 , swaging fixture block 176 , deswaging rod drive assembly 180 , and actuating rod drive assembly 182 .
- the block support fixture 174 is used to support actuator block 72 for deswaging operation.
- the block support fixture 174 includes a fixed pin 184 and a movable pin 186 having diameters sized to extend through shaft bore 94 to support “E” block 72 .
- Movable pin 186 is normally biased toward pin 184 and moves in the direction of arrow 192 for selectively inserting and releasing pin 186 from shaft bore 94 .
- movable pin 186 is retracted from pin 184 to insert fixed pin 184 into bore 94 of “E”-block 72 and then released so that pin 186 is inserted through bore 94 to secure the actuator block 72 relative to the deswaging apparatus 170 .
- pin 186 is retracted as illustrated by arrow 192 so that pins 184 , 186 are removed from shaft bore 94 .
- Swaging fixture block 176 is coupled to base 172 and includes arms 194 , 196 , and seat 198 .
- Arms 194 , 196 include a deswaging rod channel 200 and an actuating rod channel 202 , respectively.
- Deswaging rod 130 extends through channel 200 and is operated via drive assembly 180 (shown schematically); and actuator rod 152 extends through channel 202 and is operated via drive assembly 182 (shown schematically).
- Actuator arms 78 , 80 , 82 , 84 of actuator block 72 are supported at seat 198 with stakes 118 aligned with rod 130 .
- Seat 198 supports plates 158 , 160 in alignment with actuator arms 78 , 80 , 82 , 84 and rods 130 , 152
- block support fixture 174 i.e., block 188 , 190
- the slide detent assembly 210 includes a slide track 212 , slide 214 , platform 216 , detent pin 218 , and graduated detent holes 220 .
- the slide track 212 is fixedly supported relative to base 172 .
- Slide 214 includes a slide recess 222 aligned relative to slide track 212 so that slide 214 moves along slide track 212 , as illustrated by arrow 224 .
- Platform 216 is fixedly coupled to slide 214 for supporting blocks 188 , 190 and detent pin 218 .
- Detent pin 218 is supported relative to platform 216 in alignment with graduated detent holes 220 , formed on base 172 .
- Plate 160 defines a reference plate or member for operation.
- Slide 214 movably supports block support fixture 174 relative to swaging fixture block 176 for aligning selected actuator arms 78 , 80 , 82 , 84 relative to plate 160 for deswaging.
- Detent holes 220 are positioned on base 172 at graduated locations for selective alignment of each actuator arm 78 80 , 82 , 84 , relative to reference plate 160 .
- Pin 218 extends through a selected detent hole 220 , depending upon the particular actuator arm 78 , 80 , 82 , 84 being deswaged.
- Detent pin 218 is supported relative to platform 216 via bracket 226 , which is fixed to platform 216 and has shaft 228 supported between arms 230 , 232 of bracket 226 .
- Shaft 228 extends through support block 234 , which is biased toward arm 232 via spring 236 .
- Block 234 and shaft 228 include pin holes 238 , 240 .
- Pin 218 extends through pin holes 238 , 240 for insertion into a selected detent hole 220 .
- Shaft 228 is secured between arms 230 , 232 via clamp 242 .
- slide 214 is moved to align the selected actuator arm 78 , 80 , 82 , 84 , relative to plate 160 .
- pin 218 is withdrawn from a selected detent hole 220 so that platform 216 and slide 214 move relative to base 172 to an alternate alignment. Thereafter, pin 218 is released for insertion into the desired detent hole 220 .
- Blocks 188 , 190 are fixedly coupled to platform 216 .
- Pin 184 is fixed to block 188 via plate 244 and fastener 246 .
- the fastener may be any known fastener.
- Pin 186 is movably coupled to block 190 via extension rod 248 which extends from end of pin 186 through bore 250 of block 190 and is secured to plate 252 .
- the length of extension rod 248 and pin 186 is sufficient so that the pin 186 moves between a retracted position and an extended position.
- Pin 186 (and extension rod 248 ) are normally biased toward pin 184 via spring 254 to secure actuator block 72 .
- Knob 256 is coupled to extension rod 248 to force rod 248 against the spring bias to retract pin 186 as illustrated by arrow 192 to either mount or remove actuator block 72 . Thereafter, knob 256 is released so that pin 186 is biased toward pin 184 to support block 72 via bore 94 . It should be noted that the orientation of the fixed pin 188 and movable pin 190 are different in FIGS. 8 and 9 and the invention is not limited to any particular orientation.
- Rod drive assembly 180 is coupled to deswaging rod 132 for operation. Deswaging rod 132 is normally biased in a retracted position via spring 260 . Deswaging rod drive assembly 180 includes a calibration member 262 and a stroke rod 264 . The stroke rod 264 is aligned with an extended end of rod 130 to force rod 130 against the spring bias for operation. Calibration member 262 aligns stroke rod 264 so that the stroke rod 264 positions rod 130 at the operation position at the center axis 150 of the particular actuator arm having the stake removed. The stroke rod 264 moves rod 130 between the operating position and the extended position of the deswaging stroke of rod 130 .
- Stroke rod 264 is movably supported relative to rod 130 via drive block 266 .
- Drive block 266 moves stroke rod 264 between an engaging position and a non-engaging position. In the engaging position, the stroke rod 264 contacts an end 267 of the rod 130 to position the rod 130 in gap 148 at the operating position. In the non-engaging position, the stroke rod 264 is out of alignment with rod 130 so that rod 130 may be withdrawn for loading and unloading an “E”-block 72 .
- Block 266 is coupled to slide 268 for selective placement of the stroke rod 264 in the engaging position and the non-engaging position.
- Slide 268 includes a recess 270 , which is sized to move along slide track 272 , as illustrated by arrow 274 .
- Slide track 272 is stationarily supported via block 276 , secured to base 172 .
- drive block 266 supporting rod 264
- drive block 266 is moved to support stroke rod 264 in the engaging position to move rod 130 along the deswaging stroke.
- stroke rod 264 The operating position of stroke rod 264 is precalibrated relative to reference plate 160 via calibration member 262 so that when block 266 supports stroke rod 264 in the engaging position, and mounting plate 112 is aligned relative to plate 160 , flanged end 142 is aligned in gap 148 at center axis 150 .
- the extent of the stroke of rod 264 (between a retracted position and an extended position) corresponds to the distance from center axis 150 to the end of hole 102 to remove the stake 118 .
- Calibration member 262 is an externally-threaded cylindrical member and extends through threaded bore 278 of drive block 266 for movement within said threaded bore 278 .
- Calibration member 262 includes internally-threaded bore 280 to support stroke rod 264 which is externally threaded and is sized to extend through internally-threaded bore 280 .
- Stroke rod 264 includes knob 282 and control pin 284 .
- Control pin 284 is aligned with a slot 286 on knob 288 of calibration member 262 to define the stroke of the rod 264 between the retracted position and the extended position.
- Rod drive assembly 182 drives rod 152 via an actuation cylinder 290 having an operating rod 294 reciprocating therein to move between a retracted position and an extended position.
- cylinder 290 is a pneumatic cylinder.
- Valve control ports 296 , 298 control air pressure to extend and retract operating rod 294 .
- Actuation cylinder 290 is supported relative to base 172 via block 300 , coupled to base 172 . Movement of the operating rod 294 is transferred to the rod 152 via a coupler 302 to insert rod 152 into rod 130 to expand rod 130 to the deswaging dimension.
- Actuator mechanism 304 selectively supplies pressure to valve control ports 296 , 298 to extend and retract rod 294 .
- FIG. 10 is a side view of the block support fixture 174 , illustrating operation of the movable pin 186 between an extended position, shown in phantom, and a retracted position for loading and unloading an actuator block 72 (not shown).
- spring 254 operates within a cavity defined between extension rod 248 ; and through bore 250 to normally biases the pin 186 to the extended position, shown in phantom.
- knob 256 may be pulled, as illustrated by arrow 192 , to force the pin 186 against the spring bias to retract pin 186 for loading and unloading “E-block” 72 .
- the block support fixture 174 is movably supported relative to swaging fixture block 176 via slide 214 , movable along slide track 212 , fixed to base 172 of the device.
- pin 218 secures the slide relative to base 172 via detent holes 220 (shown in FIG. 9) to selectively position a desired actuator arm 78 , 80 , 82 , 84 relative to plate 160 for deswaging.
- Adjacent detent holes 220 are spaced to sequentially align adjacent actuator arms relative to plate 160 for deswaging.
- the pin 218 is retracted, as illustrated by arrow 306 , to allow the slide 214 to move.
- the pin 218 extends through block 234 , which is biased via spring 236 , as previously explained.
- block 234 includes an internal chamber 308 .
- Spring 236 extends about rod 238 in chamber 308 to bias block 234 toward arm 232 for alignment of hole 240 with pin 218 .
- Actuator arms support upper and lower suspension assemblies 106 , 108 coupled to the actuator arms via opposed stakes 118 - 1 , 118 - 2 .
- the actuator or “E”-block 72 is mounted to aligned the extended end or face 124 of stake 118 - 1 relative to the flanged end 142 of rod 130 and mounting plate 112 - 1 adjacent reference plate 160 .
- the “E”-block is unloaded and turned to align the extended end or face 124 of stake 118 - 2 relative to the flanged end 142 of rod 130 and mounting plate 112 - 2 adjacent to plate 160 .
- FIG. 11 is a detailed side view of the deswaging fixture block 176 .
- slide 268 supports stroke rod 264 out of alignment with the deswaging rod 132 so that rod 130 may be retracted while “E” block 72 is mounted and rod 130 is inserted through holes 102 of actuator arms.
- the mounting plate 112 (and stake 118 ) to be removed is aligned relative to plate 160 and prongs 166 are inserted through holes 116 .
- Slide 214 is moved (arrow 224 ) to position the selected mounting plate 112 relative to reference plate 160 for deswaging operation.
- FIG. 12 is a more detailed view of seat 198 and plates 158 , 160 supported via plugs 310 , 312 secured to fixture block 176 .
- Placement of swaging flange 142 is precalibrated so that when rod 262 is in the engaging position, and contacts rod 130 , flanged end 142 is positioned in gap 148 at center axis 150 .
- Placement of the flanged end 142 is calibrated (prior to mounting “E” block 72 for operation) by a shim having a dimension equal to one-half the thickness of an actuator arm plus the mounting plate.
- the shim (not shown) is aligned with plate 160 and stroke rod 264 is positioned in the engaging position to advance the flanged end 142 of rod 130 .
- flanged end 142 is adjusted via calibration member 262 until flanged end 142 contacts the shim.
- member 262 has been used to calibrate stroke rod 264 so that the stroke rod 264 will consistently place flanged end 142 relative to center axis 150 , when the stroke rod 264 is in the engaging position.
- Stroke rod 264 is moved (via rotation) between the retracted position and the extended position to advance rod 130 along the deswaging stroke (i.e., between the operating position and the extended position).
- the extent of the stroke of rod 264 is defined via cooperation of control pin 284 movable within slot 286 of knob 288 .
- FIG. 13 is a view taken along line 13 — 13 of FIG. 11 .
- slot 286 includes first and second stroke ends 314 , 316 .
- Control pin 284 of rod 264 is aligned with and movable in slot 286 between first and second stroke ends 314 , 316 .
- the extent between stroke ends 314 , 316 corresponds to the distance between the center axis 150 (i.e., operating position) and the extended position to remove a stake 118 (and mounting plate 112 ) from an actuator arm.
- stakes may be removed from actuator arms as illustrated by the flow chart of FIG. 14 .
- the stroke rod 264 is calibrated prior to operation as illustrated by block 320 .
- a shim is aligned with reference plate 160 , as illustrated by block 322 .
- Rod 130 is advanced towards the shim and drive block 266 , supporting stroke rod 264 is moved to the engaging position to align stroke rod 264 with rod 130 as illustrated by blocks 324 , 326 .
- Calibration member 262 is adjusted to move stroke rod 264 and rod 130 to position flanged end 142 of rod 130 to abut the shim, as illustrated by block 328 .
- drive block 266 is moved to the non-engaging position and rod 130 is withdrawn so that the rod does not interfere with mounting “E” block 72 for deswaging, as illustrated by blocks 330 , 332 .
- an “E”-block 72 may be mounted on block support fixture 174 as illustrated by block 334 .
- Rod 130 is then inserted through holes 102 of actuator arms and drive block 266 supporting stroke rod 264 is moved to the engaging position as illustrated by blocks 336 , 338 .
- the position of the block support fixture 174 is adjusted via slide 214 to align mounting plate 112 - 1 (and stake 118 - 1 to be removed) with reference plate 160 .
- the drive block 266 is moved to the engaging position to align stroke rod 264 for operation, as illustrated by block 340 .
- Actuator rod 152 is inserted to expand rod 130 to the swaging dimension as illustrated by block 342 .
- the stroke rod 264 is then advanced by rotating stroke rod 264 so that control pin 284 moves between stroke ends 314 , 316 as illustrated by block 344 to remove the stake.
- actuator rod 152 is withdrawn, as illustrated by block 346 , and the drive block 266 is moved to the non-engaging position, as illustrated by block 348 .
- rod 130 is sized for insertion through channels 120 of stakes 118 and hole 102 .
- the diameter of channel 120 is approximately 0.087 inches (2.208 mm)
- the maximum diameter of the flanged end 142 is approximately 0.086 inches (2.18 mm).
- the flange angle is preferably 30°.
- the diameter of the second diameter portion 138 is 0.070 inches (1.7 mm), and the length of portion 138 is 0.15 inches (3.8 mm).
- the diameter of the first portion 136 is 0.086 inches (2.18 mm).
- the overall length of rod 130 is preferably 2.5 inches (63.5 mm).
- the length of slits 140 is preferably 0.25 inches (6.35 mm), and the thickness is approximately 0.010 inches (0.253 mm).
- the diameter of central bore 134 is 0.059 inches (1.49 mm), and the diameter of rod 152 is 0.086 inches (2.18 mm).
- the expandable device 130 of the present invention provides a device for removing a single suspension assembly staked to an actuator arm of an “E” block.
- the expandable device 130 includes a flanged end 142 defining a deswaging surface 144 .
- the expandable device 130 is adapted to operate between an insertion dimension and a deswaging dimension.
- the device 130 is sized for insertion through channels of tubular stakes 118 to Position the flanged end 142 relative to the end surfaces 124 of stakes 118 .
- the expandable device is expanded to the deswaging dimension for operation.
- the flanged end 142 expands so that the deswaging surface 144 aligns with the end surface 124 to push the stake 118 out of the hole 102 of the actuator arm.
Abstract
Description
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/867,171 US6772506B2 (en) | 1997-05-05 | 2001-05-29 | Method for detaching swaged components of a disc drive |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4582097P | 1997-05-05 | 1997-05-05 | |
US08/946,762 US6269532B1 (en) | 1997-05-05 | 1997-10-08 | Device for detaching swaged components in a disc drive |
US09/867,171 US6772506B2 (en) | 1997-05-05 | 2001-05-29 | Method for detaching swaged components of a disc drive |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/946,762 Division US6269532B1 (en) | 1997-05-05 | 1997-10-08 | Device for detaching swaged components in a disc drive |
Publications (2)
Publication Number | Publication Date |
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US20010027602A1 US20010027602A1 (en) | 2001-10-11 |
US6772506B2 true US6772506B2 (en) | 2004-08-10 |
Family
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US08/946,762 Expired - Fee Related US6269532B1 (en) | 1997-05-05 | 1997-10-08 | Device for detaching swaged components in a disc drive |
US09/867,171 Expired - Fee Related US6772506B2 (en) | 1997-05-05 | 2001-05-29 | Method for detaching swaged components of a disc drive |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US08/946,762 Expired - Fee Related US6269532B1 (en) | 1997-05-05 | 1997-10-08 | Device for detaching swaged components in a disc drive |
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US (2) | US6269532B1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080130174A1 (en) * | 2005-07-06 | 2008-06-05 | Fujitsu Limited | Fixing method, head support mechanism and information recording apparatus |
US20100169130A1 (en) * | 2008-12-31 | 2010-07-01 | Stubhub, Inc. | System and methods for prioritizing and processing updated inventory information for event listings |
US8996143B2 (en) | 2011-09-06 | 2015-03-31 | Western Digital Technologies, Inc. | System and method to align a boss of a head gimbal assembly to a boss hole of an actuator arm for disk drive assembly |
US9180563B2 (en) | 2013-03-08 | 2015-11-10 | Western Digital Technologies, Inc. | De-swage machine for removal of a head from a head stack assembly and method of using the same |
US10332149B2 (en) | 2008-10-31 | 2019-06-25 | Ebay Inc. | System and methods for upcoming event notification and mobile purchasing |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6728072B1 (en) * | 2001-03-06 | 2004-04-27 | Hutchinson Technology, Inc. | Intergral base plate with boss tower |
JP4980290B2 (en) * | 2008-04-21 | 2012-07-18 | 日本発條株式会社 | Suspension for disk unit |
JP5808891B2 (en) | 2010-07-27 | 2015-11-10 | 日本発條株式会社 | Head assembly method, rod jig and caulking ball |
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US20080130174A1 (en) * | 2005-07-06 | 2008-06-05 | Fujitsu Limited | Fixing method, head support mechanism and information recording apparatus |
US10332149B2 (en) | 2008-10-31 | 2019-06-25 | Ebay Inc. | System and methods for upcoming event notification and mobile purchasing |
US11144958B2 (en) | 2008-10-31 | 2021-10-12 | Stubhub, Inc. | System and methods for upcoming event notification and mobile purchasing |
US20100169130A1 (en) * | 2008-12-31 | 2010-07-01 | Stubhub, Inc. | System and methods for prioritizing and processing updated inventory information for event listings |
US8738409B2 (en) | 2008-12-31 | 2014-05-27 | Stubhub, Inc. | System and methods for prioritizing and processing updated inventory information for event listings |
US8996143B2 (en) | 2011-09-06 | 2015-03-31 | Western Digital Technologies, Inc. | System and method to align a boss of a head gimbal assembly to a boss hole of an actuator arm for disk drive assembly |
US9180563B2 (en) | 2013-03-08 | 2015-11-10 | Western Digital Technologies, Inc. | De-swage machine for removal of a head from a head stack assembly and method of using the same |
US9308609B2 (en) | 2013-03-08 | 2016-04-12 | Western Digital Technologies, Inc. | De-swage machine for removal of a head from a head stack assembly and method of using the same |
Also Published As
Publication number | Publication date |
---|---|
US20010027602A1 (en) | 2001-10-11 |
US6269532B1 (en) | 2001-08-07 |
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